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What will the following peptides look like structurally at pH 1, pH 7, pH 12. (You will draw 3 structures for each.)
A.) Ala-Gln-Lys-Phe
B.)Ser-Met-Lys-Val
Which of the following solvents, hexane, methylene chloride, acetone, or methanol will give the best seperation on a TLC plate of a mixture composed of
the ei mass spectrum of cocaine r1 ch3 r2 ph is shown below.a. for the four highest-mass fragments what masses are
A mass of G grams of a liquid are placed in a closed 15 liter, fixed-wall container. The molecular weight of the liquid is 18 g mol-1. Its molar heat of vaporization is 44 kJ mol-1. Its normal boiling point is 373 K. A scientist measures the press..
If a raindrop weighs 56 mg on average and 5.1 multiplied by 105 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 4.0 h?
Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB + C ----> A + BC Determine whether the mechanism below is valid for this reaction.
The same mass of solute is dissolved in 9.82 g of t-butanol instead of cyclohexane. What is the expected freezing point change of the solution
Oleic acid has one double bond and a molar mass of 282.45 g/mol. If iodine number is equal to the number of grams of Iodine (1) that combines with 100 grams of a fat or oil substance; calculte the iodine number for Oleic acid.
an unknown sample of cu2 gave an absorbance of 0.262 in aa analysis. then 1.00 ml of solution containing 100.0 ppm cu2
Describe the attractive and repulsive forces between an atom of oxygen and an atom of sodium .
Calculate the molar solubility of AgBr in a 1.00 M aqueous solution of ammonia. Then calculate the solubility of AgBr in pure water, and compare the two solubilities. (Ksp for silver bromide is 7.7x10 -13 and Kf for Ag(NH3)2+ is 1.6x10^7)
In the one that minimizes the formal charge, how many double bonds does the chlorine atom make? How many double bonds does each N2O5 resonance structures have
What is the molarity of sodium acetate. What is the pH of the solution. Please show the steps. (note pK = 4.76) Use log10 for all calculations.
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